Pipe-coupling.



E. M. ARENA.

PIPE COUPLING. APPLICATION FILED AUG-25, 1914- Patented Nov. 14, 1916.

. 5 mm 351 1'6 a,

ERNEST ARENA, OE BROOKLYN, NEW YORK.

PIPE-COUPLING.

Specification of Letters Patent.

Patented Nov. 14, 1916.,

Application filed August 25, 1914. Serial No. 858,422.

To all whom it may concern:

Be it known that I, ERNEST M. ARENA, a

citizen of the United States, and residing at Brooklyn, in the county ofKings and State of New York, have invented certain new and usefulImprovements in Pipe-Couplings, of which the following is aspecification, such as will enable those skilled in the art to which itappertains to make and use the same. v

This invention relates to couplingsfor pipes of various kinds andclasses and particularly of what are known as extension or slipcouplings and the object thereof is to provide an improved device ofthis class which is simple in construction and the operation of whichwill effectually seal water pipes, gas pipes, steam pipes or other pipesconnected therewith or thereby.

The invention is fully disclosed in the following specification,of'which the accompanying drawing forms a part, in which the separateparts of my improvement are designated by suitable reference charactersin each of the views, and in which Figure 1 is a central, longitudinalsection of my improved pipe coupling, and ;Fig. 2 a cross section on theline 2-2 of Fig. 1.

In the practice of my invention, I provide a main tubular couplingmember a one end of which vis provided with a reduced extension a havingan interior thread a and into which one section of a pipe may bescrewed. The other end of the main coupling member a is providedwith anexte rior thread a and inserted thereinto is a supplemental tubularcoupling member I) provided at itsinner end with an annular flange b Thecoupling member I) is smaller than the coupling member a and placedbetween said parts are metallic packing rings a and d between which isplaced an annular pack ing member 6- of fiber or other suitablematerial.

In the construction shown, the inner dimensions of the screw threadedend of the main coupling member a are slightly enlarged as shown at aand this forms an annular shoulder a which corresponds with the annularshoulder formed by the flange b of the coupling member I) and thelongitudinal dimensions of the packing rings or members 0, d and e intheir normal condi tion is greater than the corresponding dimensions ofthe space between the threaded end part of thevmain coupling member aand the inner end portion of the. coupling member band when said packingmembers 0, d, and e have been placed in position, a cap 7 is screwedonto the threaded end portion of the main coupling member a, and whenthis cap is screwed fully home the packing member 6 will be firmlycompressed between the packing members 0 and d, as will be readilyunderstood, and this makes a perfectly tight joint between said couplingmembers a and I) while at the same time permitting the coupling memberI) to slide with more or less freedom in the coupling member a.

I, The outer end of the coupling member 7) in the form of constructionshown, is threaded as shown at b and in practice a pipe may be screwedthereto as will be readily understood and this pipe may correspond indimensions with'the pipe screwed into the end portion a of the couplingmember a.

My improved pipe coupling may be used wherever devices of this class arerequired, and while I have shown and described the details of theconstruction which I prefer, my invention is not limited thereto, andchanges therein and modifications thereof may be made, within the scopeof the appended claims, without departing from the spirit of myinvention or sacrificing its advantages.

Having fully described my invention, whatI claim as new and desire tosecure by Letters Patent is 1. A slip pipe coupling device comprising amain tubular member provided near one flange which slidably engages aportion of the inner surface of the main member, the

recessed portion of the main member and the inserted portion of thesupplemental member forming an annular packing chamber, a metallicpacking ring provided in said chamber and engaging said annularshoulder, a fiber packing ring provided in said chamber and engagingsaid metallic ring, a second metallic ring arranged in the chamber andabutting against the fiber ring, and a screw threaded cap screwed ontothe threaded end of the main tubular member and through which thesupplemental member is freely movable, said cap being also adapted tocompress said packings.

2. A slip pipe coupling device comprising a main tubular member providednear one end with external screw threads, the inner surface of saidmember being recessed for a portion of its length to form an annularshoulder, a supplemental tubular member inserted in the externallythreaded end of the main'tubular member and provided at its inner endwith an annular projecting flange which slidably engages a portion ofthe inner surface of the main member, the recessed port-ion of the mainmember and the inserted portion of the supplemental member forming anannular packing chamber, a metallic packing ring provided in saidchamber having a surface co-extensive with the shoulder and the flangeand engaging said annular shoulder, a fiber packing ring provided insaid chamber and engaging said metallic ring, a second metallic ringarranged in the chamber and abutting against the fiber ring, and a screwthreaded cap screwed onto the threaded end of the main tubular memberand through which the supplemental member is freely movable, said capbeing also adapted to compress said packings.

In testimony that I claim the foregoing as my invention I have signed myname in presence of the subscribing witnesses this 22nd day of August1914:.

ERNEST M. ARENA.

Witnesses C. MULREANY, H. E. THOMPSON.

